Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
  • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
  • H04N1/1903—Arrangements for enabling electronic abutment of lines or areas independently scanned by different elements of an array or by different arrays
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
  • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
  • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
  • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
  • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
  • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
  • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
  • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
  • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
  • H04N1/1934—Combination of arrays
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/40—Picture signal circuits
  • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
  • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
  • H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]

Definitions

• the present invention relates to a medical image recording apparatus for recording an output image of various diagnostic apparatuses such as an X-ray CT, and more specifically, to directly recording on a recording medium without using a CRT, and an optical path length of an optical system is extremely large.
• the present invention relates to a medical image recording apparatus that is short and has few mechanical operating mechanisms. (Background technology)
• FIG. 3 shows an example of the basic configuration of this type of medical image recording apparatus.
• 1 is a He-Ne laser
• 2 is a lens
• 3 is a prism.
• the light emitted from the laser 1 passes through the lens 2, is bent 90 ° by the prism 3, and enters the acousto-optic modulator 4.
• the laser light is modulated by ultrasonic waves corresponding to the grayscale information of the image, becomes light carrying the grayscale information of the image, passes through the beam expander 5, the prism 6, and the tilt angle is corrected by the tilt angle correction optical system 7.
• the polygon mirror scanner 8 performs exposure while scanning the recording film 9 in the horizontal direction while reflecting the incident light with the mirror as the mirror rotates. On the other hand, scanning in the vertical direction is performed by the film feed of the film feed mechanism # 0.
• the medical image recording apparatus as described above has advantages such as good resolution, little image distortion, and no phosphor noise, because the CRT is not used as a medium.
• both the rotation mechanism of the polygon mirror scanner 8 for scanning the horizontal axis as main scanning and the recording film feeding mechanism for sub scanning are used. Since it is a mechanical scanning mechanism, it has many moving parts, which is disadvantageous in reliability and transport durability. Also, the optical path length from the laser light source to the film is Although it is quite long, it is constructed by bending the beam using a mirror to prevent it from becoming longer in one direction, but it is difficult to make it structurally compact.
• An object of the present invention is to realize a compact medical image recording apparatus with a small number of movable parts and a short optical path length.
• the medical image recording apparatus of the present invention electronically scans an LED array assembly ( ⁇ 4) having a ⁇ -dimensional array of a plurality of LEDs with an LED array controller (28).
• the motor controlled by the controller (29) is sent in a direction perpendicular to the ED array direction.
• the LED array controller and the film feed controller are based on commands from the scanning controller (27).
• the running controller is controlled by a CPU, and the amount of light emitted from each LED in the LED array assembly is calculated based on the image data stored in the image data storage memory (22) via the input interface (21).
• the image is formatted by an image formatter (25), converted to an analog signal by a DZA converter (26) or a pulse width modulation circuit (30), and converted to an analog signal. Is controlled by a signal applied to the icon Bok rollers -. BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a schematic diagram of a recording mechanism part of a medical image recording apparatus according to an embodiment of the present invention
• FIG. 2 is a block diagram of a control system of the medical image recording apparatus according to the embodiment of the present invention
• FIG. 3 is a schematic diagram of a conventional medical image recording apparatus
• FIG. 4 is a diagram showing an example using two LED arrays
• FIG. 5 is a block diagram of a control system of another embodiment of the present invention.
• FIG. 5 is a diagram showing a recording mechanism part of the medical image recording apparatus according to the embodiment of the present invention
• FIG. 2 is a block diagram showing a control system of the medical image recording apparatus according to the embodiment of the present invention.
• Digital image data which is an input signal of the medical image recording apparatus, is supplied to an image data storage memory 22 via an input interface 21. Is stored in. The capture of the image data into the input interface 21 is controlled by the CPU 24 in accordance with a command issued from the camera operation controller 23.
• the image data stored in the image data storage memory 22 is written in accordance with the order established by the image formatter 25 according to the recording format (frame layout) command issued from the CPU 24 based on the command from the camera operation controller 23.
• the signal is sent to the D / A converter 26 and becomes an analog signal.
• the recording format command from the CPU 24 is also given to the scanning controller 27, and the scanning controller 27 is used to give command signals to the LED array controller 28 and the film feed controller 29. And controlling the LED array assembly 14 and the motor 17 to perform scanning in the y direction.
• the analog data signal from the DZA converter 26 enters the LED array controller 28 and controls the l.ED array assembly 14. In this case, since all of them operate based on the recording format command from the CPU 24, they naturally cycle.
• FIG. 5 shows another embodiment of this circuit.
• reference numeral 30 denotes a pulse width modulation circuit which converts image data into a pulse width modulation signal and supplies the signal to the LED array controller 28. The rest is the same as in Fig. 2.
• the ED array assembly 14 is composed of an LED array 11, an LED drive I2 and a rod lens array 13 as shown in the figure, and the LED array 11 is in the film width direction (X direction).
• High-density (for example, ⁇ ⁇ 6 dots / arbitrary) ED elements are exposed by illuminating the ED elements through the rod lens array 13 to form an image on the film ⁇ 5.
• the film # 5 and the rod lens array # 3 are very close but not in contact.
• the scanning in the X direction is performed according to a command from the LED array controller 28 based on a command from the scan controller 27, and the light emission of the elements of the LED array 11 is controlled by the LED array controller 28 based on data from the D / A converter 26.
• the LEDIg operation IC12 operates according to the instruction.
• the amount of light emitted from each LED element is controlled in an analog manner by means such as direct modulation of drive current or pulse width modulation.
• the LED array controller 28 controls each LED by an analog data signal. In addition to controlling the light intensity of the elements, it also controls the blinking of LED elements and compensates for luminance differences due to variations in characteristics between elements.
• the scanning in the y direction is performed by rotating the film feed roller # 6 according to a command from the film feed controller 29 to the motor # 7.
• the film feed controller 29 also takes out and sets a film from a supply magazine (not shown) or stores a photographed film in a receive magazine (not shown).
• the optical path of the exposure mechanism of the medical image recording apparatus of the present invention is extremely short, and the scanning is performed mechanically in the y direction but is performed in the X direction. Is performed electrically, with only one mechanical means and fewer moving parts. Note that this is only an example.
• the input interface was considered digital, an analog video signal input was provided with a video interface and digitized by an A./D converter.
• the film may be sent to scan in the y direction, but the LED array may be moved. Furthermore, is the LED array a single one across the film width? As described in Fig. 4, two arrays may be arranged in two rows as shown in Fig. 4 to reduce the length of one array. In this case, it is a matter of course that the central overlapping portion is controlled so that only one array emits light.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Facsimile Scanning Arrangements (AREA)
• Apparatus For Radiation Diagnosis (AREA)
• Dot-Matrix Printers And Others (AREA)
• Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
• Radiography Using Non-Light Waves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=17124525

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (4)

Citations (2)

Family Cites Families (9)

• 1985
  • 1985-10-31 JP JP60244826A patent/JPS62104363A/ja active Granted
• 1986
  • 1986-10-30 EP EP19860906458 patent/EP0244490A4/en not_active Withdrawn
  • 1986-10-30 US US07/074,538 patent/US4777535A/en not_active Expired - Fee Related
  • 1986-10-30 WO PCT/JP1986/000557 patent/WO1987002850A1/ja not_active Application Discontinuation

Patent Citations (2)

Non-Patent Citations (1)

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